John H. wrote:
On Wed, 17 Oct 2018 23:20:17 -0000 (UTC), Bill wrote:

Wayne.B wrote:
On Wed, 17 Oct 2018 16:54:57 -0400, John H.
wrote:

On Wed, 17 Oct 2018 16:19:33 -0400, "Mr. Luddite" wrote:

On 10/17/2018 1:42 PM, John H. wrote:
A friend told me about this stuff:

https://www.youtube.com/watch?v=1uaIVIUVOyM

Will try it.



I remember my dad using stuff like that back when I was just a kid.
Didn't come in a bag though. He had to glass vials with the
components in it. He used it to put flotation foam on each end
of a canoe and also between the rafters on the underside of a raft
we had in a small lake.

Only thing I noticed in the video is that there cannot be any standing
water in the hole. I seem to remember you commenting that there was
water or the water table was very high or something.


Yeah, like I told Greg - I'm going to let things dry up a bit. Project
is now postponed until next
week. We're going on a camping trip tomorrow.

===

John, I believe you're over thinking this thing. I'd do it pretty
much the way Greg has suggested: Mix up some concrete the usual way
with some sand and gravel; Insert post in ground; Pour concrete around
it. The concrete, being heavier than water, will sink to the bottom
and push the water up until it overflows. Check post for vertical,
open a beer, and come back in a couple of hours. After all it's just
a mailbox, not a structural support for a high rise building. :-)


I would just use gravel. Maybe quarter dust. The small stuff that makes
great pathways. A heck of a lot easier to replace the post when a snowplow
or idiot driver takes it out.

We've got six-inch curbs, so no fear of it being snow-plowed. But the
mailbox is heavy. That's why I
want to be sure of the support. It's made from high-density polyethylene
(HDPE), better known as
'poly-lumber'. Pretty heavy stuff when compared to a tin or plastic mailbox.

https://www.dutchcrafters.com/Amish-...ailbox/p/54986

Beautiful work on this thing.


I think you are over thinking the strength needed. We have a similar
style mailbox. Not at the curb, but on the porch. Is on a 4x4 in a tire
rim. Bolt in the bottom and 4 rods from the side to the post. Rim filled
with dirt as a planter. This is 2nd mailbox in same rim. Older box, had
the plywood splitting. And that is over 25 years.